Defines Extension and StreamElement interfaces for stream initiation (SI), as documented in JEP-0095. It also defines a common interface for all SI profile structures to implement.

NOTE: This package depends on {@link org.jabberstudio.jso.x.fneg}.

@author linuxwolf @version 0.13-DEV-20050624155226 @since JSO-0.12 @see JEP-0095: Stream Initiation